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Question 84Asked in DSSSB TGT Computer Science (Technical), 7 Aug 2021, Shift 3

Two balls are drawn at random with replacement from a box containing 10 blue and 8 pink balls. What is the probability that both the balls are pink?

  1. A4/9
  2. B16/81
  3. C64/81
  4. D8/81
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Correct answer: (B) 16/81

Explanation

With replacement the draws are independent: P = (8/18) × (8/18) = (4/9)² = 16/81.

From DSSSB TGT Computer Science PYQ (Technical), 7 Aug 2021, Shift 3

This is question 84 of DSSSB TGT Computer Science PYQ (Technical), 7 Aug 2021, Shift 3. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.